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• Integrated WiMAX (on some models)
Security features
• Fingerprint reader (on some models)
Specications
ThinkPad Edge E420 specications
Size
• Width: 343.4 mm (13.52 inch)
• Depth: 234 mm (9.21 inch)
• Height: 29.3 to 33.1 mm (1.15 to 1.30 inch)
Heat output
• 65 W (222 Btu/hr) maximum or 90 W (307 Btu/hr) maximum (depending on the model)
Power source (ac power adapter)
• Sine-wave input at 50 to 60 Hz
• Input rating of the ac power adapter: 100 to 240 V AC, 50 to 60 Hz
Battery pack
• Lithium-ion (Li-Ion) battery pack
Battery life
• For percentage of remaining battery power, see the Power Manager Battery Gauge in the task bar.
• The Power Manager also displays a green, yellow and red indication. A battery under warranty with a red
indication is eligible for a warranty replacement.
ThinkPad Edge E520 specications
Size
• Width: 380 mm (14.96 inch)
• Depth: 249 mm (9.8 inch)
• Height: 30.4 to 33.6 mm (1.20 to 1.32 inch)
Heat output
• 65 W (222 Btu/hr) maximum or 90 W (307 Btu/hr) maximum (depending on the model)
Power source (ac power adapter)
• Sine-wave input at 50 to 60 Hz
• Input rating of the ac power adapter: 100 to 240 V AC, 50 to 60 Hz
Battery pack
• Lithium-ion (Li-Ion) battery pack
18 User Guide